Portion of a vehicle exterior



FIG. 1 is a perspective view of a portion of a vehicle exterior showingmy new design;

FIG. 2 is a side elevational view, the opposite side elevational viewbeing a mirror thereof;

FIG. 3 is a rear elevational view thereof; and,

FIG. 4 is a top plan view thereof.

The broken line showing of the details of the tail light is forillustrative purposes only and forms no part of the claimed design.

The ornamental design for a portion of a vehicle exterior, as shown anddescribed.